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See detailLa palabra al pueblo: implicaciones jurídicas y políticas de la votación
Colussi, Ilaria Anna ULg

Scientific conference (2016, October 13)

The conference was focusing on the Italian referendum for modifying the Constitution, to be held in December 2016. The speech posed the attention on the Italian constitutional system and its history, on ... [more ▼]

The conference was focusing on the Italian referendum for modifying the Constitution, to be held in December 2016. The speech posed the attention on the Italian constitutional system and its history, on the substance of the proposal of reform, and legal and political implications of the vote, i.e. the possible effects on European Union stability and on Italian scenario. [less ▲]

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See detailPILs as a new active material for radical organic batteries
Aqil, Mohamed ULg; Ouhib, Farid ULg; Aqil, Abdelhafid ULg et al

Poster (2016, October 13)

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See detailSynthesis and characterization of non-isocyanate polyurethane (NIPU) hydrogels
Gennen, Sandro ULg; Grignard, Bruno ULg; Thomassin, Jean-Michel ULg et al

Poster (2016, October 13)

Due to its good biocompatibility, biodegradation and excellent mechanical properties, polyurethane (PU) is a material of choice for biomedical applications (gloves, tubing, artificial membranes…) and, as ... [more ▼]

Due to its good biocompatibility, biodegradation and excellent mechanical properties, polyurethane (PU) is a material of choice for biomedical applications (gloves, tubing, artificial membranes…) and, as hydrogels, it was used as wound dressing, soft contact lenses, drug delivery systems and scaffolds for tissue engineering. Classically, PU are synthesized by a step-growth polymerization between poly (di-)ols and poly (di-) isocyanates. Due to the toxicity of isocyanates, REACH regulations have changed and, today, there is a need to develop greener and safer route to produce isocyanate-free PUs. This contribution focus on the synthesis of NIPU hydrogels by copolymerizing a bifunctional CO2-sourced hydrophilic PEG bi-cyclic carbonate with diamines in presence of a cross- linker. The PEG bi-cyclic carbonates was prepared via a CO2/epoxide coupling reactions using a new efficient organocatalytic system based on the use of an ammonium salt (TBAI) in combination with a fluorinated alcohol. [less ▲]

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See detailAlkylcobalt as source of radicals for the controlled polymerization of less activated vinyl monomer
Demarteau, Jérémy ULg; Cordella, Daniela ULg; Kermagoret, Anthony et al

Poster (2016, October 13)

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See detailA daily, 1 km resolution data set of downscaled Greenland ice sheet surface mass balance (1958–2015)
Noel, B.; van de Berg, W. J.; Machguth, H. et al

in Cryosphere (The) (2016), 10

This study presents a data set of daily, 1 km resolution Greenland ice sheet (GrIS) surface mass balance (SMB) covering the period 1958–2015. Applying corrections for elevation, bare ice albedo and ... [more ▼]

This study presents a data set of daily, 1 km resolution Greenland ice sheet (GrIS) surface mass balance (SMB) covering the period 1958–2015. Applying corrections for elevation, bare ice albedo and accumulation bias, the high-resolution product is statistically downscaled from the native daily output of the polar regional climate model RACMO2.3 at 11 km. The data set includes all individual SMB components projected to a down-sampled version of the Greenland Ice Mapping Project (GIMP) digital elevation model and ice mask. The 1 km mask better resolves narrow ablation zones, valley glaciers, fjords and disconnected ice caps. Relative to the 11 km product, the more detailed representation of isolated glaciated areas leads to increased precipitation over the southeastern GrIS. In addition, the downscaled product shows a significant increase in runoff owing to better resolved low-lying marginal glaciated regions. The combined corrections for elevation and bare ice albedo markedly improve model agreement with a newly compiled data set of ablation measurements. [less ▲]

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See detailNovel promising way to synthesize non-isocyanate polyurethanes (NIPUs) for innovative coating applications against corrosion protection of metal surfaces
Panchireddy, Satyannarayana ULg; Grignard, Bruno ULg; Thomassin, Jean-Michel ULg et al

Poster (2016, October 13)

Polyurethanes (PUs) are one of the most widely used polymeric materials with applications in automotive, as sealants, adhesives, decorative, aircraft topcoats, for coatings or as foams for thermal and/or ... [more ▼]

Polyurethanes (PUs) are one of the most widely used polymeric materials with applications in automotive, as sealants, adhesives, decorative, aircraft topcoats, for coatings or as foams for thermal and/or acoustic insulation. Industrially, PUs are produced by copolymerization between polyols and polyisocyanates. Because of the toxicity issues related to the use of isocyanates, there is a need to develop greener and safer route to produce such polymers. This study reports on the synthesis of new sustainable isocyanates-free PU (NIPU) coatings for aluminium anticorrosion. In a first step, bio- and CO2-sourced cyclic carbonates monomers were synthesized by coupling of epoxydized vegetable oils with CO2 using a new efficient bicomponent organocatalyst. In second step formulations including cyclic carbonates/amines/additives were optimized to produce highly adhesive cross-linked NIPU coatings that show good resistance against solvents and long-term barriers preventing the corrosion of the aluminiumsubstrate [less ▲]

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See detailMésopotamie et Golfe : réflexions sur les modalités d'échanges de matériaux de prestige au IIIe millénaire av. J.-C.
Couturaud, Barbara ULg

in Le carnet de la MAFKF. Recherches archéologiques franco-koweïtienne de l'île de Faïlaka (Koweït) (2016)

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See detailProfessionnels de la voix : Comment optimiser votre outil de travail ?
Remacle, Angélique ULg

Conference given outside the academic context (2016)

La voix, faiseuse de sons et génératrice de relation, appartient à un univers riche et complexe, longtemps méconnu. Instrument de travail et de communication souvent malmené, la voix est considérée comme ... [more ▼]

La voix, faiseuse de sons et génératrice de relation, appartient à un univers riche et complexe, longtemps méconnu. Instrument de travail et de communication souvent malmené, la voix est considérée comme un dû. La plupart d’entre nous l’utilisent en aveugle…Les usages que nous en faisons sont multiples. Ils dépendent autant de notre appétence à la vocalisation que de notre facilité ou non à accéder à un geste vocal harmonieux. Les bavards parlent à tort et à travers, les timides se taisent, tandis que les insatisfaits convoitent la voix des autres. Certains encore courtisent leur voix et, fascinés, guettant la moindre de ses faveurs, rêvent d’en devenir les maîtres. C’est souvent le cas chez les professionnels de la voix, tels les comédiens, les chanteurs et les enseignants. L’intérêt que nous lui portons parle de nous-mêmes…Tout comme notre corps dont elle est l’émanation sonore, la voix, fonction magique, grandit, se fortifie puis vieillit… Elle peut s’altérer, se fatiguer, changer, nous abandonner. La santé vocale existe. Qui l’eut dit ? Par la complexité de son anatomie et les particularités de sa physiologie, la voix révèle nombre de curiosités inédites dont la connaissance éclaire bien au-delà de ce que nous pourrions penser.Qu’est-ce que la voix ? Comment fonctionne-t-elle ? Peut-on se prémunir de ses défaillances ? Professionnels de la voix, comment gérer la charge vocale qui est la vôtre ? Qu’est-ce que le forçage vocal et comment l’éviter ? Comment grandir en confort vocal et quels sont les grands principes d’hygiène vocale ? Quelles pratiques pour vous aider à mieux connaître votre capital voix ? La méthode Feldenkrais : en quoi peut-elle nous aider à développer notre santé vocale ?Mercredi 12 octobre à partir de 14h30, la Journée de la voix MGEN vous invite en région grenobloise à un moment d’exception : communications scientifiques dispensées par des spécialistes nationaux renommés alterneront avec de brillants intermèdes artistiques ! Éducation vocale des professionnels et bonnes pratiques seront au coeur des propos ! [less ▲]

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See detailSemiochemicals to control wireworms
Verheggen, François ULg

Conference (2016, October 12)

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Peer Reviewed
See detailDroplet formation by squeezing in a microfluidic cross-junction
Van Loo, Stéphanie ULg; Stoukatch, Serguei ULg; Kraft, Michael ULg et al

in Microfluidics and Nanofluidics (2016), 20(10), 1-12

In microfluidics, flow focusing is widely used to produce water-in-oil droplets in microchannels at high frequency. We here report an experimental study of droplet formation in a microfluidic cross ... [more ▼]

In microfluidics, flow focusing is widely used to produce water-in-oil droplets in microchannels at high frequency. We here report an experimental study of droplet formation in a microfluidic cross-junction with a minimum number of geometrical parameters. We mostly focus on the squeezing regime, which is composed of two distinct steps : filling and pinching. The duration of each step (and corresponding volumes of each liquid phase) are analyzed. They vary according to both water and oil flow rates. These variations provide several insights about the fluid flows in both phases. We propose several scaling laws to relate the droplet volume and frequency to the flow rate of both phases. We also discuss the influence of surfactant and channel compliance on droplet formation. [less ▲]

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See detailMigration in Extreme Climate Change Scenarios
Gemenne, François ULg; Blocher, Julia; de Longueville, Florence et al

Conference (2016, October 12)

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See detailWalking droplets in confined geometries
Filoux, Boris ULg; Hubert, Maxime ULg; Schlagheck, Peter ULg et al

Poster (2016, October 12)

When gently placing a droplet onto a vertically vibrated bath, under specific conditions, coalescence may be avoided. The drop bounces permanently. Upon increasing the forcing acceleration, the drop ... [more ▼]

When gently placing a droplet onto a vertically vibrated bath, under specific conditions, coalescence may be avoided. The drop bounces permanently. Upon increasing the forcing acceleration, the drop interacts with the wave it generates, and becomes a walker [1,2]. Recently, some 2D confining systems for walking droplets have been developed: cylindrical cavity, harmonic potential or the use of Coriolis force [3,4]. In addition, the interactions between two identical walkers have been studied in a 2D case [5]. Nevertheless, no study focuses on 1D dynamics and their properties. In this work, we show it is possible to confine a walker in a quasi mono-dimensional geometry by using a submerged annular cavity. We focus on the interactions between droplets, and show the interdistance quantization. Then, we study the speed of pairs of walkers and show that the distance between the drops affects the group speed: the closer the drops are, the faster they move. We also propose a numerical model to characterize the distance quantization, and the evolution of the speed of a string of droplets. Finally, we investigate the case of a string of droplets. We discuss the influence of the number of droplets and the distance between droplets on the string speed. 1. Y. Couder, S. Protière, E. Fort, and A. Boudaoud, Nature 437, 208 (2005).
 2. S. Protière, A. Boudaoud, and Y. Couder, J. Fluid Mech. 554, 85 (2006).
 3. S. Perrard, M. Labousse, M. Miskin, E. Fort, and Y. Couder, Nat. Commun. 5, 3219 (2014).
 4. M. Labousse and S. Perrard, Phys. Rev. E 90, 022913 (2014).
 5. C. Borghesi, J. Moukhtar, M. Labousse, A. Eddi, E. Fort, and Y. Couder, Phys. Rev. E 90, 063017 (2014). [less ▲]

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See detailDiez preguntas para auto-evaluar el perfil de egreso, el Programa y los cursos en una perspectiva de ABC (Aprendizaje Basado en Competencias) y con enfoque programa en la Ensenanza superior.
Leclercq, Dieudonné ULg

Scientific conference (2016, October 11)

Actualmente las universidades estructuran sus perfiles de egreso, programas y cursos aplicando dos principios esenciales: (1) el Aprendizaje Basado en Competencias o ABC y (2) el Enfoque Programa. En la ... [more ▼]

Actualmente las universidades estructuran sus perfiles de egreso, programas y cursos aplicando dos principios esenciales: (1) el Aprendizaje Basado en Competencias o ABC y (2) el Enfoque Programa. En la presente ponencia se analiza las significaciones e implicaciones de estas expresiones, así como el impacto que tienen sobre las evaluaciones en estos tres niveles. Además se presentan algunas preguntas clave que los docentes pueden (deben) hacerse para autoevaluar sus logros en cada nivel; proceso permanente porque los currículos viven y se trasforman para adaptarse a los cambios en el mundo o para inducirlos. Cada una de las preguntas de autoevaluación se explican en detalle, con conceptos y ejemplos, en el libro Ideas e Innovaciones, Dispositivos de Evaluación de los Aprendizajes en la Educación, o IDEAS (Leclercq y Cabrera, 2014), escrito con la contribución de 16 autores. Para ilustrar lo que se puede hacer al evaluar, en el capítulo 3 de IDEAS, se usa una rosa de los vientos —motivo de la línea gráfica de este encuentro—, la cual describe lo existente o aquello que podría ser. Entre todas estas posibilidades, esta ponencia, presenta aquello que, desde mi punto de vista, se debe hacer. Las preguntas servirán para abordar sucesivamente la estructura de un currículo, la cual puede concebirse como un cubo, que en su cara frontal (dimensión horizontal), contiene a los tres pilares de la formación, siendo el pilar central el de los objetivos o del perfil de egreso, el cual puede articularse en cuatro pisos (dimensión vertical) llamados DIME (competencias Dinámicas, Instrumentales, Metacognitivas y Específicas); el pilar izquierdo representa los métodos y el derecho, las evaluaciones. En este esquema, las evaluaciones a las que puede someterse una propuesta curricular, se sitúan en cuatro niveles de profundidad o de amplitud temporal. El ABC implica que son los docentes, trabajando en equipos, los que deben concebir instrumentos para evaluar desempeños complejos. Se explicará por qué un Enfoque Programa es imprescindible para (1) Concebir situaciones reales o simuladas que agrupen saberes, destrezas y actitudes, (desarrollados en varios cursos), y cómo los docentes, sin perder de vista las competencias (concordancia vertical), pueden preparar a los estudiantes para esto. (2) Que cada curso (o cada actividad de enseñanza-aprendizaje) evidencie la Triple Concordancia entre Objetivos, Métodos y Evaluaciones (concordancia horizontal). Aquí, los criterios de calidad de las evaluaciones serán sólo mencionados, porque los ejemplos de sus aplicaciones a casos concretos se darán en la ponencia de Álvaro Cabrera. Finalmente, expondré lo que es el currículo oculto y cómo combatirlo. Ver documento atado. [less ▲]

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See detailRadicalisation violente : comment construire nos interventions ?
Glowacz, Fabienne ULg

Conference given outside the academic context (2016)

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See detailLiège Game Lab Showcase
Dozo, Björn-Olav ULg

Conference (2016, October 11)

Detailed reference viewed: 9 (1 ULg)
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See detailRelative positioning with Galileo E5 AltBOC code measurements
Deprez, Cécile ULg; Warnant, René ULg

Conference (2016, October 11)

For over a decade, Europe has started to develop its own Global Navigation Satellite System (GNSS). Initiated in 1999, the Galileo project finally materialized a few years ago, recently experiencing a ... [more ▼]

For over a decade, Europe has started to develop its own Global Navigation Satellite System (GNSS). Initiated in 1999, the Galileo project finally materialized a few years ago, recently experiencing a prompt expansion with the launch, in 2015 and 2016, of 8 satellites belonging to the Full Operational Capability (FOC) generation. Broadcasting new signals, with new modulations, the first studies addressing this system reveal promising level of precisions on both code and carrier phase observables. Still in test phase but already available for measurements, this recent system can be used to estimate positions. Among the new signals developed by the Galileo program, the Galileo E5 AltBOC, also known as Galileo E5a+b or Galileo E5, reveals great characteristics. Thanks to its particular AltBOC modulation, it allows more precise code and phase observations besides being less affected by multipath. These innovative performances should lead to more precise position estimations than with any other signal presently in use. In this master thesis, we compared the positions estimated with GPS and Galileo on their different frequencies (L1, L2, L5 for GPS and E1, E5a, E5b and E5 AltBOC for Galileo). We combined the observations made by the receivers belonging to the University of Liège (2 Trimble NetR9 receivers, 1 Septentrio PolaRxS receiver and one Septentrio PolaRx4 receiver) in double differences (DD) combinations using various configurations (zero baseline (ZB), short baseline (SB) and medium baseline (MB)). It turns out that Galileo E5 AltBOC outperforms all other signal in terms of observation precision (estimated in a DD SB configuration in order to remove atmospheric and clock error sources affecting the signal). Regarding the precision obtained on the computed positions, we could reach a few decimetres with Galileo E5 code pseudoranges on baselines up to 25 kilometres. [less ▲]

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See detailStudy of the volatile organic compounds in the interaction between banana plants and the fungal disease Fusarium oxysporum f.sp. cubense Tropical Race 4 (FocTR4)
Berhal, Chadi ULg; De Clerck, Caroline ULg; LEVICEK, CAROLINA et al

Conference (2016, October 11)

Banana fruit (Musa sp.) ranks fourth in term of worldwide production, and has economical and nutritional key values. Cavendish is the popular and most dominant variety of the dessert banana group ... [more ▼]

Banana fruit (Musa sp.) ranks fourth in term of worldwide production, and has economical and nutritional key values. Cavendish is the popular and most dominant variety of the dessert banana group. Nowadays, it is endangered by the emergent race of the Panama disease, caused by Fusarium oxysporum f.sp. cubense TR4 (Foc TR4). Despite the importance of the Volatile Organic Compounds (VOCs), which are secondary metabolites with a high vapour pressure, and their role in plant protection, they have never been documented as a way to manage this disease on Cavendish. Thus, the aim of this PhD thesis is to study the VOCs in the specific interaction Cavendish/Foc TR4, as a way to manage this threat. Based on the work previously done with other plants at Gembloux Agro-Bio Tech, a protocol was optimized for the extraction of the banana plant’s VOCs. In parallel, models of in-vitro and in-vivo inoculations are under development to distinguish the VOCs emitted by the root zone and those emitted by the aerial part of the plant. The results of the first analysis showed that the majority of the Cavendish VOCs belongs to the terpenes group, as well as ketones and an organic ester. The VOCs specifically emitted during the plant-pathogen interaction will be studied more in depth by evaluating their effect on the plant and the pathogen. At long term, and depending on the results, agro-ecological applications of this knowledge could include breeding for new variety or combining banana with other plants expressing VOCs against Foc TR4, applying VOCs on field to stimulate plant defences or to contain the pathogen. [less ▲]

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See detailQuestion flamande, question wallonne (1918-1930)
Lanneau, Catherine ULg

Conference given outside the academic context (2016)

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See detailVers une société géolocalisée
Hallot, Pierre ULg

Scientific conference (2016, October 10)

A l’instar de la révolution induite par la disponibilité du temps pour chaque individu de la société, la possibilité de connaître sa position géographique conduit à de nouveaux challenges. Actuellement ... [more ▼]

A l’instar de la révolution induite par la disponibilité du temps pour chaque individu de la société, la possibilité de connaître sa position géographique conduit à de nouveaux challenges. Actuellement, il est possible de se géolocaliser à n’importe quel endroit du globe. Connaître sa position à l’intérieur d'un bâtiment, d'un centre commercial, voir au sein même d’un rayonnage n’est plus une utopie. Cette disponibilité de géolocalisation conduit d’une part à des changements importants dans la manière d’appréhender l’espace, et d’autre part, à la création de nouveaux services basé sur la connaissance de sa position en temps réel. A cours de cette conférence, nous aborderons les principes et systèmes permettant de collecter et de traiter cette information de position acquise en temps réel. Nous verrons ensuite quelques exemples d’utilisations de cette masse d’information collectée, notamment via l’utilisation de réseaux sociaux. L’exposé proposera volontairement une vision pragmatique de la question de la géolocalisation de la société sans se positionner, a priori, sur ses bienfaits ou ses dérives. [less ▲]

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